The e*thirteen HELIX R 12 cassette is an upgrade to any SRAM Eagle or Shimano drivetrain, and offers more range than other cassette options. The 9 tooth cog lets you step down one chainring size while keeping the same top end gearing and provides not only better ground clearance, but an overall lighter drivetrain.

• Works flawlessly with Shimano and SRAM drivetrains
• Helix R is durable and serviceable, with replaceable gear clusters
• Cassette Body Type: SRAM XD 11/12 Speed
• Cassette Cogs: 9- 11- 13- 15- 17- 20- 23- 27- 31- 36- 42- 50
• Color: Nickel
• Defined Color: Silver
• Drivetrain Speeds: 12
• Range: 9-50
• Weight: 345